Hi Pedro, I am afraid we decided to remove eyeball positions stream in the upcoming API update. Instead you will be able to access head pose stream (x, y, z, yaw, pitch, roll) which will come in higher precision than the old eyeball position stream.
Hopefully this might be still useful for your needs? Unfortunately 3d eyeball position signal is unstable and is significantly worse than gaze point signal, so we don’t want developers to utilize it. We hope at some point in the future we can reintroduce this feature.